Question

0,07a ^8 b^4: a7 + 0,03a^2b^6: (ab2)при a = 7, b = −2

Answer 1

Ответ:

1) 7,8а +2,3а - 5а=5,1а. при а=6: 5,1 *6=30,6. 2) 2(0,3б + 5) +1,4б=0,6б+10+1,4б=2б+10. при б=4: 2*4+10=8+10=18. 3) 6(а + 1,5) - 2 

Answer 2

To evaluate the given expression, we substitute the values of a and b into the expression and perform the calculations.

Given: a = 7 and b = -2

Let's calculate each term separately:

Term 1: 0,07a^8b^4

Substituting the values of a and b: 0.07 * (7^8) * (-2^4)

Calculating the exponents first: 0.07 * (5764801) * (16)

Term 1 evaluates to: 5,108,161.12

Term 2: 0,03a^2b^6

Substituting the values of a and b: 0.03 * (7^2) * (-2^6)

Calculating the exponents first: 0.03 * (49) * (64)

Term 2 evaluates to: 96.96

Term 3: (ab^2)

Substituting the values of a and b: 7 * (-2^2)

Calculating the exponent first: 7 * (4)

Term 3 evaluates to: 28

Now let's combine the terms:

Expression = Term 1 + Term 2 / Term 3

Expression = 5,108,161.12 + 96.96 / 28

Performing the division first: Expression = 5,108,161.12 + 3.47

Expression evaluates to: 5,108,164.59