Question

Which one among the following is true?
(A)√m+√n=√m+n
(B)√(m+1)√(n+1)=√(m+1)(n+1)
(C)√m-√n =√m-n
(D)1/√m+√n =√m-n
(E) None of these​

Answer 1

When we write a number a, it is actually a1, said as a to the power 1.

a2 = a*a

a3 = a*a*a

:

:

an = a*a*a*a* . . . n times.

Basic formulas in Powers and Roots

Some basic formulas used to solve questions on exponents are:

(am)n = (an)m = amn

am.an = am+n

a-m = 1/am

am/an = am-n = 1/an-m

(ab)n = anbn

(a/b)n = an/bn

a0 = 1

Answer 2

When we write a number a, it is actually a1, said as a to the power 1.

a2 = a*a

a3 = a*a*a

:

:

an = a*a*a*a* . . . n times.

Basic formulas in Powers and Roots

Some basic formulas used to solve questions on exponents are:

(am)n = (an)m = amn

am.an = am+n

a-m = 1/am

am/an = am-n = 1/an-m

(ab)n = anbn

(a/b)n = an/bn

a0 = 1