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प्रश्न
If a = – 1, b = 2, then find the value of the following:
ab + ba
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उत्तर
Given, ab + ba
If a = –1 and b = 2,
Then (–1)2 + (2)–1
= `1 + 1/2` ...`[∵ a^-m = 1/a^m]`
= `(2 + 1)/2`
= `3/2`
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संबंधित प्रश्न
Which of the following is equal to `(- 3/4)^-3`?
(–5)–2 × (–5)–3 = (–5)–6
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An insect is on the 0 point of a number line, hopping towards 1. She covers half the distance from her current location to 1 with each hop. So, she will be at `1/2` after one hop, `3/4` after two hops, and so on.
- Make a table showing the insect’s location for the first 10 hops.
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An insect is on the 0 point of a number line, hopping towards 1. She covers half the distance from her current location to 1 with each hop. So, she will be at `1/2` after one hop, `3/4` after two hops, and so on.
Will the insect ever get to 1? Explain.
Find a single machine that will do the same job as the given hook-up.
a (× 599) machine followed by a (5–100) machine.
Find a single repeater machine that will do the same work as hook-up.
Find x.
5x + 5x – 1 = 750
If a = – 1, b = 2, then find the value of the following:
ab × ba
Simplify:
`(1/5)^45 xx (1/5)^-60 - (1/5)^(+28) xx (1/5)^-43`
