Surds and indices

• 1

• 3

• 9

• 3ⁿ

• 1/5

• -1/5

• 2/5

• -2/5

If 5^(x+3)=25^(3x-4) then x is

• 5/11

• 11/5

• 11/3

• 13/5

If m and n are whole numbers, such that mⁿ=121 then the value of (m-n)ⁿ⁺¹ is

• 1

• 10

• 121

• 1000

• 0

• 1

• x^a-b-c

• None

• x^abc

• 1

• x^ab+bc+ca

• x^a+b+c

• 0

• x^abc

• x^a+b+c

• x⁰

If 3^x-y =27 and 3^x+y =243 find x

(a)