a)(-1)¹⁰⁰⁵+(-1)¹⁰⁰⁴= b) (-1)⁴+(+1)³-(-1)⁷+(-1)⁵+(+1)¹⁰⁰= c) (-10)⁰+(-5)¹-(-3)⁰+(+100)⁰-(-1)¹⁰⁰= d) 3⁶+(-3)⁵= e) (-7)³+7³-7⁴=
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Given:
a) (-1)¹⁰⁰⁵ + (-1)¹⁰⁰⁴ =
b) (-1)⁴ + (+1)³ - (-1)⁷ + (-1)⁵ + (+1)¹⁰⁰ =
c) (-10)⁰ + (-5)¹ - (-3)⁰ + (+100)⁰ - (-1)¹⁰⁰ =
d) 3⁶ + (-3)⁵ =
e) (-7)³ + 7³ - 7⁴ =
To find:
Solve the above equations.
Solution:
a) (-1)¹⁰⁰⁵ + (-1)¹⁰⁰⁴
= (-1)(-1)¹⁰⁰⁴ + (-1)¹⁰⁰⁴
= (-1)¹⁰⁰⁴(-1 + 1)
= (-1)¹⁰⁰⁴ × 0
= 0
b) (-1)⁴ + (+1)³ - (-1)⁷ + (-1)⁵ + (+1)¹⁰⁰
= 1 + 1 - (-1) + (-1) + 1
= 1 + 1 + 1 - 1 + 1
= 3
c) (-10)⁰ + (-5)¹ - (-3)⁰ + (+100)⁰ - (-1)¹⁰⁰
= 1 + (-5) - 1 + 1 - 1
= -5
d) 3⁶ + (-3)⁵
= 3⁴.3² + (-3)⁴(-3)¹
∵ 3⁴ = (-3)⁴
∴ 3⁴.3² + 3⁴(-3)¹
= 3⁴(3² + (-3)¹)
= 3⁴(9 - 3)
= 81 × 6
= 486
e) (-7)³ + 7³ - 7⁴
∵ (-7)³ + 7³ = 0
∴ 0 - 7⁴
= -2401
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