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Anonymous User Best Answer
B check attachment
sir, how you got -1 in option b?
x²=1 => x=±1
since domain € real numbers, therefore, option b should be correct.
√1 ki value ±1 hogi isme f ki codomain [0,&] use nahi hogi
samaj nahi aaya mujhe please clarify.
kisi bi number ke root ki two vlaues hoti hai ± so if we take - sign then option false
par sir aisa hamesha sahi nahi hota hai na?