हिंदी

If A = [(1, 0),(0, -1)], show that A3 = A. - Mathematics

Advertisements
Advertisements

प्रश्न

If A = `[(1, 0),(0, -1)]`, show that A3 = A.

प्रमेय
Advertisements

उत्तर

A = `[(1, 0),(0, -1)]`

A2 = A × A

= `[(1 xx 1 + 0 xx 0, 1 xx 0 + 0 xx (-1)),(0 xx 1 + (-1) xx 0, 0 xx 0 + (-1) xx (-1))]`

= `[(1, 0),(0, 1)]`

= I

A3 = A2 × A

= `[(1, 0),(0, 1)] xx [(1, 0),(0, -1)]`

= `[(1 xx 1 + 0 xx 0, 1 xx 0 + 0 xx (-1)),(0 xx 1 + 1 xx 0, 0 xx 0 + 1 xx (-1))]`

= `[(1, 0),(0, -1)]`

= A

∴ A3 = A

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Matrices - Exercise 8C [पृष्ठ १६५]

APPEARS IN

नूतन Mathematics [English] Class 10 ICSE
अध्याय 8 Matrices
Exercise 8C | Q 13. | पृष्ठ १६५
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×