The approximate value of (1.05) 6 to 0.01 is () (A)1.23 (B)1.24 (C)1.33 (D)1.34

The approximate value of (1.05) 6 to 0.01 is () (A)1.23 (B)1.24 (C)1.33 (D)1.34

（1+0.05）^6
=1+6*0.05+15*0.05^2+……
1+0.3+0.0375+……
=1.3375.
Choose D

(1 + I) to the power of 2008
If the fifth power of (1 + 2I) = x + Yi, then x =? Y =?

The power of (1 + I) = (2I) ^ 1004 = (- 4) ^ 502, and the result is this
The fifth power of (1 + 2I) = (4i-3) (4i-3) (1 + 2I) = (- 7-24i) (1 + 2I) = 41-38i
So x = 41, y = - 38

It is known that in the product of polynomial x2 + ax + B and 3x-2, the coefficient with x2 term is 7, and the product does not contain x term

(x²+ax+b)(3x-2)
=3x³-2x²+3ax²-2ax+3bx-2b
=3x²+(3a-2)x²+(3b-2a)x-2b
The coefficients of X &# 178; are 7, 3a-2 = 7, a = 3
And the product does not contain x term, 3b-2a = 0, 3b-2 * 3 = 0, B = 2;