Advertisements
Advertisements
प्रश्न
If a = – 1, b = 2, then find the value of the following:
ab + ba
Advertisements
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`
APPEARS IN
संबंधित प्रश्न
Find the value of `1/(3^(-2))`.
The value of `(2/5)^-2` is ______.
The value of (–2)2×3 – 1 is ______.
The value of `(-2/3)^4` is equal to ______.
If `(5^m xx 5^3 xx 5^-2)/5^-5 = 5^12`, find m.
The cells of a bacteria double in every 30 minutes. A scientist begins with a single cell. How many cells will be there after 12 hours?
Planet A is at a distance of 9.35 × 106 km from Earth and planet B is 6.27 × 107 km from Earth. Which planet is nearer to Earth?
An electron’s mass is approximately 9.1093826 × 10–31 kilograms. What is this mass in grams?
Supply the missing information for diagram.
By what number should (–15)–1 be divided so that the quotient may be equal to (–5)–1?
